CN111023877A - Magnetic fluid rotary heat exchanger - Google Patents

Abstract

The invention discloses a magnetic fluid rotary heat exchanger which comprises an outer shell, a magnetic part arranged on the outer surface of the outer shell and a rotor assembly body arranged in the outer shell, wherein a plurality of rotor tiles are arranged on a rotor in the rotor assembly body, so that the heat exchange area is increased, and meanwhile, the magnetic fluid is used as cooling liquid and has a thermomagnetic flow effect under the action of a magnetic field, so that the heat exchange rate of a heat exchange device is improved. The magnetofluid rotary heat exchanger has the advantages of simple structure, compact design, relative independence of all parts, and convenient maintenance and overhaul; the system has good interchangeability, and can realize modularization, serialization and rapid design; has no special requirements for working environment and can adapt to various special environments.

Description

Magnetic fluid rotary heat exchanger

Technical Field

The invention relates to the technical field of heat exchangers, in particular to a magnetic fluid rotary heat exchanger.

Background

Most of the existing heat exchangers do not transmit the motion process in the heat exchange process, so that the heat exchangers cannot be suitable for the heat exchange of rotary machinery. Meanwhile, the heat exchange medium suitable for the rotary heat exchanger in the prior art is mostly gas, the heat exchange efficiency is low, the structure is also complex, and the rotary heat exchanger is not beneficial to series production.

Thus, there is a need for improvement and improvement in the art.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a magnetofluid rotary heat exchanger, aiming at solving the problems of complex structure and low heat exchange efficiency of the existing heat exchanger.

The technical scheme of the invention is as follows:

a magnetofluidic rotary heat exchanger, comprising: the rotor assembly comprises an outer shell, a rotor assembly body arranged in the outer shell, magnetic pieces arranged on the outer surface of the outer shell and end covers arranged at two ends of the outer shell; the rotor assembly body comprises a first rotor and a second rotor, a first channel for the magnetic fluid to enter and exit the rotor assembly body is arranged on each of the first rotor and the second rotor, a flow channel is arranged at one end of the first channel, a plurality of rotating tiles are arranged at the other end of the first channel, and the plurality of rotating tiles on the first rotor are connected with the plurality of rotating tiles on the second rotor in a nested mode.

Optionally, the magnetic fluid rotating heat exchanger is characterized in that the plurality of rotating tiles are arranged around the first channel in a circular ring shape.

Optionally, the magnetic fluid rotating heat exchanger is characterized in that the plurality of rotating tiles on the first rotor are arranged around the first channel in a multi-layer circular ring shape, the diameters of the rings where each layer of rotating tiles are located are different, the heights of the rotating tiles on each layer of rings are gradually reduced outwards along the center, and a magnetic fluid gap is reserved between any two adjacent rotating tiles.

Optionally, the magnetic fluid rotating heat exchanger is characterized in that the plurality of rotating tiles on the second rotor are arranged around the first channel in a multi-layer circular ring shape, the diameters of the rings where each layer of rotating tiles are located are different, the heights of the rotating tiles on each layer of rings are increased outwards step by step along the center, and a magnetic fluid gap is reserved between any two adjacent rotating tiles.

Optionally, the magnetic fluid rotating heat exchanger is characterized in that a first groove is formed in the end face, close to the outer shell, of the end cover, and a first sealing element is arranged in the first groove.

Optionally, the magnetic fluid rotating heat exchanger is provided with a rotating part on the flow channel, and a second groove for accommodating the rotating part is provided on the end cover.

Optionally, the magnetic fluid rotating heat exchanger further includes a third groove disposed in the second groove, and a second sealing member is disposed in the third groove.

Optionally, the magnetic fluid rotary heat exchanger further comprises a heating layer disposed between the magnetic member and the outer casing, and a heat insulating layer disposed on an outer surface of the magnetic member.

Optionally, the magnetic fluid rotating heat exchanger is configured to be a magnetic body.

Optionally, the magnetic fluid rotary heat exchanger, wherein the first seal is a magnetic seal.

Optionally, the magnetic fluid rotary heat exchanger, wherein the second seal is a magnetic seal.

Optionally, the magnetic fluid comprises a medium and nano ferroferric oxide particles dispersed in the medium by a surfactant.

Optionally, the magnetic fluid rotary heat exchanger, wherein the magnetic fluid further comprises heat conducting particles dispersed in the medium.

Optionally, the magnetic fluid rotary heat exchanger, wherein the heat conducting particles are one or more of diamond particles, graphite particles, graphene particles, silver particles and aluminum particles.

Optionally, the magnetic fluid rotating heat exchanger, wherein the medium is one or more of deionized water, kerosene, engine oil, phosphate solution and fluoroether oil.

Has the advantages that: the invention provides a magnetic fluid rotary heat exchanger which comprises an outer shell, a magnetic part arranged on the outer shell and a rotor assembly body arranged in the outer shell, wherein a plurality of rotary tiles are arranged on a rotor in the rotor assembly body, so that the heat exchange area is increased. The magnetic part can provide a stable magnetic field environment for the rotor assembly body, and the thermomagnetic flow effect generated by the magnetic fluid under the action of the magnetic field, so that the heat exchange rate of the heat exchange device is improved. The magnetofluid rotary heat exchanger provided by the invention has the advantages of simple structure, compact design, relative independence of each part, and convenience in maintenance and overhaul; the system has good interchangeability, and can realize modularization, serialization and rapid design; has no special requirements for working environment and can adapt to various special environments.

Drawings

Fig. 1 is a perspective view of a magnetofluid rotary heat exchanger provided by the present invention.

Fig. 2 is a quarter-turn cross-sectional view of a ferrofluid rotary heat exchanger provided in accordance with the present invention.

Fig. 3 is a sectional view of a rotor assembly of the magnetofluid rotary heat exchanger provided by the invention.

Fig. 4 is an exploded view of the magnetic fluid rotary heat exchanger provided by the present invention.

Fig. 5 is a cross-sectional view of another rotor assembly of the mhd rotary heat exchanger provided by the present invention.

Fig. 6 is a schematic structural view of the first rotor.

Fig. 7 is a schematic view of a second rotor structure.

Fig. 8 is a first perspective structural diagram of the first rotor.

Fig. 9 is a cross-sectional view of an end cap of a magnetic fluid rotary heat exchanger provided by the present invention.

Detailed Description

The invention provides a magnetic fluid rotary heat exchanger. In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is described in further detail below with reference to the accompanying drawings by way of embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" as used herein includes both direct and indirect connections (couplings), unless otherwise specified. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1-5, the magnetic fluid rotary heat exchanger 1 includes an outer casing 10, a rotor assembly 20 disposed inside the outer casing 10, magnetic members 11 disposed on an outer surface of the outer casing 10, and end caps 30(31) disposed at two ends of the outer casing 10; the rotor assembly 20 includes a first rotor 21 and a second rotor 22, a first channel 211 for the magnetic fluid to enter and exit the rotor assembly is respectively disposed on the first rotor 21 and the second rotor 22, a flow channel 230(240) is disposed at one end of the first channel 211, a plurality of rotating tiles 270(280) are disposed at the other end of the first channel 211, and the plurality of rotating tiles 270 on the first rotor 21 and the plurality of rotating tiles 280 on the second rotor 22 are connected in a nested manner.

In this embodiment, a magnetic fluid is used as a heat exchange medium in the heat exchange process, and the magnetic fluid generates a thermomagnetic flow effect under the action of a magnetic field provided by the magnetic member, so that when the magnetic fluid flows through the rotor, the magnetic fluid absorbs heat on the rotor to become a high-temperature magnetic fluid, and the high-temperature magnetic fluid flows out of the magnetic fluid to rotate the heat exchanger 1, thereby realizing heat exchange. The magnetic fluid does not influence the mutual rotation of the rotors when absorbing heat, so that the heat exchange can be realized in the rotating process.

Further, a cooling device may be disposed beside the magnetic fluid rotary heat exchanger 1, and the magnetic fluid rotary heat exchanger 1 is connected to the cooling device through a cooling pipeline. And cooling the high-temperature magnetic fluid flowing out of the magnetic fluid rotary heat exchanger 1 by using a cooling device, and enabling the cooled magnetic fluid to flow into the magnetic fluid rotary heat exchanger 1 again for circulation.

In this embodiment, the magnetic fluid includes nano ferroferric oxide particles and a medium, where the medium is deionized water, kerosene, engine oil, phosphate solution, fluoroether oil, and the like. The magnetic fluid is prepared by dispersing the prepared nano ferroferric oxide particles into deionized water, kerosene, engine oil, phosphate solution and fluoroether oil through a dispersing agent.

In one or more embodiments, high thermal conductive particles are further dispersed in the magnetic fluid, the high thermal conductive particles can be magnetically self-assembled in the flow channel under the action of a magnetic field to form a chain-shaped structure similar to a fin, and the high thermal conductive particles forming the chain-shaped structure are dispersed in the magnetic fluid to effectively improve the thermal conduction efficiency of the magnetic fluid. In this embodiment, by adjusting the strength of the magnetic field, the length of the chain structure formed by the high thermal conductive particles through magnetic self-assembly can be adjusted. The high-thermal-conductivity particles are made of materials with high thermal conductivity, such as diamond, aluminum, graphite, graphene and the like.

In one or more embodiments, as shown in fig. 2, a thermal insulation layer 13 is disposed on the outer surface of the magnetic member 11, and a heating layer 12 is disposed between the outer casing 10 and the magnetic member 11.

Specifically, heat on heating layer 12 is conducted through outer housing 10 to the interior of rotor assembly 20. The thermal insulation layer 13 is used for blocking heat on the heating layer 12 from conducting outwards, the length of the heating layer 12 in the axial direction is smaller than that of the outer shell 10 in the axial direction, and the length of the outer shell 10 in the axial direction is smaller than that of the thermal insulation layer 13 in the axial direction. The magnetic member 11 is a ring magnet or a magnetic field coil wound on the outer surface of the heating layer 12. For providing a magnetic field in the direction of the magnetic fluid flow.

Now, the heat exchange process of the magnetofluid rotary heat exchanger is explained by taking heating as an example. Assuming that the first rotor 21 in the rotor assembly 20 is a high temperature side (heat source) and the second rotor 22 is a low temperature side, the first rotor 21 is used to heat the second rotor 22. Rotor assembly 20 is heated by heating layer 12, and magnetic fluid containing magnetic fluid is injected into rotor assembly 20 through flow channel 230, and the first rotor 21 rotates the magnetic fluid to flow in the shoe gap. At this time, the first rotor 21 and the second rotor 22 can rotate mutually, and the magnetic fluid generates a thermomagnetic effect under the action of the external magnetic field, so that heat is transferred from the first rotor 21 to the second rotor 22, thereby realizing heating.

In one or more embodiments, referring to fig. 6 and 7, the rotor assembly 20 includes a first rotor 21 and a second rotor 22, where each of the first rotor 21 and the second rotor 22 includes a rotor body 210, a side wall 2101 is disposed around one side of the rotor body 210, a first channel 211 is disposed at a middle position of the rotor body 210, and the first channel 211 may be a circular through hole or a square through hole. Typically, the rotor body 210 is circular and the sidewall 2101 is cylindrical. A flow channel 230(240) for magnetic fluid to flow through is disposed at one end of the first channel 211, and a rotating member 250(260) is sleeved on an outer surface of the flow channel 230(240), where the rotating member may be a bearing or another component capable of rotating. The rotating member 250(260) is sleeved on the flow channel 230(240) and contacts with the rotor body 210. Wherein, the flow passage can be in a circular tube shape.

In this embodiment, the first rotor 21 and the second rotor 22 further include a plurality of tiles 270(280) disposed at the other end of the first channel 211, that is, the plurality of tiles 270(280) are disposed inside the sidewall 2101.

In the present embodiment, the first rotor 21 and the second rotor 22 are made of a high thermal conductive material. In order to achieve high thermal conductivity of the rotor, a coating or plating of a highly thermally conductive material may also be provided on the surface of the rotor. The preparation of the coating or plating layer of the high thermal conductivity material involved therein is prior art and will not be described herein again.

In some embodiments, the plurality of tiles 270 on the first rotor 21 are arranged around the first channel 211 in a multi-layer circular ring shape, the diameters of the rings where each layer of tiles is located are different, the height of the tiles on each layer of rings is gradually reduced along the center, and a gap for the supercooled liquid is reserved between any two adjacent tiles.

Specifically, the plurality of rotating tiles 270 are annularly arranged around the first passage 211 in multiple layers with the center of the first passage 211 as a center, that is, a plurality of circular rings are formed around the first passage 211, the diameter of each circular ring is different, and the distances between the circular rings are the same, which may be different. The width and the height of the rotary tile on the same ring are the same. The width of the tiles is gradually changed (such as gradually widening) from the inner layer to the outer layer, and the height is gradually reduced.

In this embodiment, the plurality of tiles 280 on the second rotor 22 are arranged around the first channel (not shown in the figure due to the view angle relationship) in a multi-layer circular ring shape, the diameter of the ring where each layer of tiles is located is different, the height of the tiles on each layer of ring is gradually increased along the center, and a gap for the supercooled liquid is left between any two adjacent tiles.

Specifically, the plurality of rotating tiles 280 are annularly arranged around the first channel 221 in multiple layers with the center of the first channel 221 as a center of a circle, that is, a plurality of circular rings are formed around the first channel 221, the diameter of each circular ring is different, and the distances between the circular rings are the same, but may also be different. The width and the height of the rotary tile on the same ring are the same. The width of the tiles is gradually changed (such as gradually widening) from the inner layer to the outer layer, and the height is gradually increased. Since the height of the tile 270 of the first rotor 21 varies in a direction opposite to the height of the tile 280 of the second rotor 22, when the first rotor 21 is matched with the second rotor 22, a part of the tile 270 is located inside the circular ring formed by the tile 280.

In some embodiments, the plurality of rolling shoes 270(280) on the first rotor 21(22) are arranged around the first channel 211 in a multi-layer circular ring shape, the diameter of the ring where each layer of rolling shoes is located is different, the height of the rolling shoes on each layer of ring is the same from the center to the outside, and a cooling liquid gap is left between any two adjacent rolling shoes. When the first rotor 21 is mated with the second rotor 22, the tiles 270, 280 fit into the gaps between the tiles 280, while the tiles 280 fit into the gaps between the tiles 270, as can be seen in fig. 4, the tiles 270, 280 are layered.

In some embodiments, with reference to fig. 8, the plurality of tiles 270(280) are arranged in a circular ring around the first channel 211. For example, if there are n tiles, the n tiles may be arranged around the first channel 211 from the inside to the outside one circle around the center of the first channel 211. The width of the tiles is gradually increased from inside to outside.

Further, the rotor body 210 may be partitioned, for example, the bottom of the rotor body 210 may be partitioned into 2 regions, 3 regions, 4 regions, 5 regions, 6 regions, and the like. Taking the division into 6 regions as an example, for example, the bottom of the rotor body 210 is uniformly divided into 6 sector regions, marked as a1, a2, A3, a4, a5 and a6, 5 turning tiles are arranged in each sector region, the 5 turning tiles are arranged in sequence from inside to outside, and the width and height of the tiles located in the same radius are the same, but may also be different. For example, the width of the tile can be reduced or increased in a certain proportion, and the height can be adjusted in the same way. The regions A1-A6 are all spaced apart, and a gap is reserved between two adjacent turning tiles in each region, and cooling liquid can pass through the gap.

In this embodiment, referring to fig. 9, the end cap 30(31) is generally circular, the material used is a non-magnetic material, the middle portion of the end cap 30(31) is provided with a second channel 310, the shape of the second channel 310 is matched with the shape of the flow channel 230(240), and the shape of the second channel 310 is circular because the flow channel 230(240) is circular. During assembly, the end caps 30(31) are inserted through the flow passages 230(240) to be closely attached to the end portions of the housing, thereby sealing the housing 11 and preventing the cooling liquid inside the rotor assembly 20 from leaking. In order to obtain better sealing effect, a first groove 330 may be formed in an end surface of the inner side of the outer edge of the end cap 30(31) near the opening of the outer shell 10, and a first magnetic sealing element 331(341) is disposed in the first groove 330, and the first magnetic sealing element 331(341) is a magnetic sealing ring. The common materials of the magnetic sealing ring include rubidium iron boron permanent magnet and ferrite permanent magnet. The sealing is mainly performed by utilizing the characteristic that the magnetic viscosity of the magnetic fluid is increased under the action of a magnetic field.

Further, a second groove 350 for accommodating the rotating member 250(260) is disposed on the end surface of the second channel 310 close to the outer casing 10, and in order to prevent the coolant from leaking out of the second channel 310, a third groove 370 is disposed in the second groove 350, and a second magnetic seal 371(381) is disposed in the third groove 370. The second magnetic seal 371(381) is a magnetic seal ring. The common materials of the magnetic sealing ring include rubidium iron boron permanent magnet and ferrite permanent magnet. The sealing is mainly performed by utilizing the characteristic that the magnetic viscosity of the magnetic fluid is increased under the action of a magnetic field.

By way of example, the magnetic fluid rotary heat exchanger provided by the invention can be used for transporting heat generated in mechanical rotation to the outside, so that a cooling effect is realized.

Specifically, the magnetic fluid cooling liquid is injected into the rotor assembly body through the flow channel, the rotor assembly body rotates, the magnetic fluid cooling liquid flows in gaps between the lower support shoes under the action of a radial magnetic field, the magnetic fluid generates a thermomagnetic flow effect under the action of the magnetic field, and therefore the heat exchange rate of the heat exchange device is improved, the rotor rotates along with the rotation of the rotor, heat is absorbed in the rotating process, and the cooling effect is achieved. It will be appreciated that the heating layer is inactive when the cooling is performed.

In summary, the present invention provides a magnetic fluid rotary heat exchanger, including: the magnetic heating device comprises a shell, a heating layer arranged on the outer surface of the shell, a magnetic part arranged on the surface of the heating layer and a heat insulation layer arranged on the outer surface of the magnetic part; the rotor assembly is arranged in the shell and comprises a first rotor and a second rotor, and the first rotor and the second rotor are arranged oppositely; the first rotor and the second rotor respectively comprise a rotor body, wherein the middle part of the rotor body is provided with a first channel, a flow channel arranged at one end of the first channel, a rotating part sleeved on the flow channel and a plurality of rotating tiles arranged at the other end of the first channel; and the end covers are respectively arranged at two ends of the shell, second channels are arranged on the end covers, the flow channel penetrates through the second channels and is exposed outside the end covers, and the shell is blocked through the end covers. The magnetic part in the outer shell can provide a stable magnetic field environment and is arranged on the rotor assembly body inside the outer shell, a plurality of rotating tiles are arranged on the rotor in the rotor assembly body, the heat exchange area is increased, and the thermomagnetic flow effect generated by the magnetic fluid under the action of the magnetic field is realized, so that the heat exchange rate of the heat exchange device is improved. The magnetofluid rotary heat exchanger provided by the invention has the advantages of simple structure, compact design, relative independence of each part, and convenience in maintenance and overhaul; the system has good interchangeability, and can realize modularization, serialization and rapid design; has no special requirements for working environment and can adapt to various special environments.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (15)

1. A magnetofluid rotary heat exchanger is characterized by comprising an outer shell, a rotor assembly body arranged in the outer shell, magnetic pieces arranged on the outer surface of the outer shell and end covers arranged at two ends of the outer shell; the rotor assembly body comprises a first rotor and a second rotor, a first channel for the magnetic fluid to enter and exit the rotor assembly body is arranged on each of the first rotor and the second rotor, a flow channel is arranged at one end of the first channel, a plurality of rotating tiles are arranged at the other end of the first channel, and the plurality of rotating tiles on the first rotor are connected with the plurality of rotating tiles on the second rotor in a nested mode.

2. The ferrofluid rotary heat exchanger according to claim 1, wherein the plurality of tiles are arranged in a circular ring around the first channel.

3. The magnetic fluid rotary heat exchanger according to claim 2, wherein the plurality of rotary tiles on the first rotor are arranged around the first channel in a multi-layer circular ring shape, the diameter of the ring where each layer of rotary tile is located is different, the height of the rotary tile on each layer of ring is gradually reduced outwards along the center, and a magnetic fluid gap is reserved between any two adjacent rotary tiles.

4. The magnetic fluid rotary heat exchanger according to claim 3, wherein the plurality of rotary tiles on the second rotor are arranged around the first channel in a multi-layer circular ring shape, the diameter of the ring where each layer of rotary tile is located is different, the height of the rotary tile on each layer of ring is gradually increased outwards along the center, and a magnetic fluid gap is reserved between any two adjacent rotary tiles.

5. The magnetic fluid rotary heat exchanger according to any one of claims 1 to 4, wherein a first groove is provided on an end surface of the end cap adjacent to the outer housing, and a first sealing member is provided in the first groove.

6. The ferrofluid rotary heat exchanger according to claim 1, wherein a rotor is disposed on the flow channel and a second recess is disposed on the end cap to receive the rotor.

7. The ferrofluid rotary heat exchanger according to claim 6, wherein a third groove is further disposed within the second groove, and a second seal is disposed within the third groove.

8. The magnetic fluid rotary heat exchanger according to claim 1, further comprising a heating layer disposed between the magnetic member and the outer housing and a thermal insulation layer disposed on an outer surface of the magnetic member.

9. The ferrofluid rotary heat exchanger according to claim 1, wherein the magnetic member is a magnet or a field coil.

10. The magnetic fluid rotary heat exchanger according to claim 5, wherein the first seal is a magnetic seal.

11. The magnetic fluid rotary heat exchanger according to claim 7, wherein the second seal is a magnetic seal.

12. The magnetic fluid rotary heat exchanger according to claim 1, wherein the magnetic fluid comprises a medium and nano ferroferric oxide particles dispersed in the medium by a surfactant.

13. The magnetic fluid rotary heat exchanger of claim 12, wherein the magnetic fluid further comprises thermally conductive particles dispersed in the medium.

14. The ferrofluid rotary heat exchanger according to claim 13, wherein the thermally conductive particles are one or more of diamond particles, graphite particles, graphene particles, silver particles, and aluminum particles.

15. The ferrofluid rotary heat exchanger according to claim 12, wherein the media is one or more of deionized water, kerosene, engine oil, phosphate solution, and fluoroether oil.

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